Support for imgui/SDL text input IME

ChangeLog.md

     * Added ability to visualize font _outline_.
     * Updated imgui to newest version, now with its own TTF support.
     * Fixed drawing of camera view frustum.
+    * Added support for imgui/SDLs IME text input rectangle.
 
     [ 20140117 ]
     * Updated imgui, fix for Logging to Clipboard included.

include/system/Window.h

 
     static void setClipboard(const char* s);
     static const char* getClipboard();
+
+    static void inputPositionCallback(int x, int y);
 };
 
 #endif

include/system/WindowGLFW.h

     static void setClipboard(const char* s);
     static const char* getClipboard();
 
+    static void inputPositionCallback(int x, int y);
+
   private:
     static void errorCallback(int error, const char* desc);
     static void sizeCallback(GLFWwindow* w, int width, int height);

include/system/WindowSDL.h

     static void setClipboard(const char* s);
     static const char* getClipboard();
 
+    static void inputPositionCallback(int x, int y);
+
   private:
     static glm::i32vec2 size;
     static bool fullscreen;

src/UI.cpp

     io.RenderDrawListsFn = UI::renderImGui;
     io.GetClipboardTextFn = Window::getClipboard;
     io.SetClipboardTextFn = Window::setClipboard;
+    io.ImeSetInputScreenPosFn = Window::inputPositionCallback;
 
     // Load font texture
     //! \TODO allow loading other TTF fonts

src/system/Window.cpp

     return ret;
 }
 
+void Window::inputPositionCallback(int x, int y) {
+#ifdef USING_SDL
+    WindowSDL::inputPositionCallback(x, y);
+#elif defined(USING_GLFW)
+    WindowGLFW::inputPositionCallback(x, y);
+#endif
+}
+

src/system/WindowGLFW.cpp

     return nullptr;
 }
 
+void WindowGLFW::inputPositionCallback(int x, int y) {
+
+}
+
 void WindowGLFW::errorCallback(int error, const char* desc) {
     Log::get(LOG_ERROR) << "GLFW Error (" << error << "): " << desc << Log::endl;
 }

src/system/WindowSDL.cpp

     return nullptr;
 }
 
+void WindowSDL::inputPositionCallback(int x, int y) {
+    SDL_Rect rect;
+    rect.x = x;
+    rect.y = y;
+    rect.w = 50;
+    rect.h = 25;
+    SDL_SetTextInputRect(&rect);
+}
+